| 摘要 |
PROBLEM TO BE SOLVED: To improve throughput while saving power.SOLUTION: An optical network unit 202 comprises: a plurality of power sources 64 to 66, 68, and 88 to 90 which are installed correspondingly to a plurality of electric circuits 74, 75, and 83 to 85 for transmitting or receiving optical signals to/from an optical line terminal 201, and supply power to the corresponding electric circuits; a power saving request reception unit 29 for receiving notification of a power saving period, in which the optical network unit 202 should perform power saving operation, from the optical line terminal 201; and a power source control unit 29 for planning a sequence of starting and stopping power supply from each power source on the basis of the power saving period and response time of each electric circuit with respect to start and stop of power supply from the corresponding power source. Each of the power sources 64 to 66, 68, and 88 to 90 performs power supply to the corresponding electric circuit on the basis of the sequence planned by the power source control unit 29. |
